Bob Morey, who had an apologetics ministry in Southern California (d. 2019), was once asked by an aggressive atheist to prove the Bible's truthfulness.

Bob responded, "You prove the Bible to me every time you open your mouth."

Shocked, she asked how this could be true.

He asked her, "Do you fear God?"

She answered, "No."

"Well," he said, "you just proved that Romans 3:18 is true. 'There is no fear of God before their eyes.'"

He proceeded, "Is the gospel foolishness to you?"

"Yes!"

He explained, "Well, you just proved 1 Corinthians 1:18. 'The message of the cross is foolishness to those who are perishing.'"

He continued, "Do you want your own way instead of living according to God's way?"

She retorted, "I don't want God's way—I'll do as I please!"

He responded, "Well, you just proved Isaiah 53:6. 'Each of us has turned to his own way.' Every time you open your mouth you confirm the Bible by saying what it said you would say. Thank you for making me a stronger Christian."

Even unbelief confirms the truth of what we believe!